Tool/software:
Hi, I would like to know which is the best solution to reduce noise, interference, non linearity, better SNR to improve signal of the ultrasonic sensor. I should use one of this part number of the SECO Sensor: SC042(https://www.seco-sensor.de/en/standard-products/sc042-d8/), SC150(https://www.seco-sensor.de/en/standard-products/sc150-d10-2/) or SC049(https://www.seco-sensor.de/en/sc049-our-smallest/).
I think that the OPA838 should be a good choose as amplfier used like active filter hope like bandpass.
So, I read in some articles of texas instruments and i see this: https://www.ti.com/lit/ab/sboa309/sboa309.pdf?ts=1741823250833&ref_url=https%253A%252F%252Fwww.google.com%252F at pag. 1 in Figure 2 that the circuit suggested is a good use to improve signal. I think that the first capacitor eliminate continuous, the partition resistor I think is used to put the signal between the power amplifier, maybe the signal offset to 2,5V if the power supply OPA838 is 5V single supply, and the negative retroaction amplify the signal like 1+R2/R1.
Another datasheet OPAx607 https://www.ti.com/lit/ds/symlink/opa607.pdf i see the circuit Figure 9-15. High-Gain Ultrasonic Front-End with schematic very interesting, so I would like to use this configuration, if is a good choose, to improve signal like the nouse, the stability, the SNR, linearity and more more...
Can I have support about this?
I should use 4 sensor utlrasonic sensor in anemometer application, so I should use a MUX and the output should be used with comparator.
My questions are:
- I should use receive path circuit after ultrasonic sensor? could be a good choose? of course is much cost, but for me the important thing is to have a signal integer without noise.
- Which configuration could be the best solution? Figure 2 or Figure 9-15? Can i have the formulas? for my application?
- Which is the best filter for ultrasonic application? Consider that I don't want to shift phase of the signal because it's important for me to use comparator and obtain the signal very very clear.
I've searched in internet this configuration about filter ultrasonic sensor:
but I've searched some information, but I don't understand the configuration or like the formulas to obtain the signal.
I've simulated with LtSpice and I think function good.
Thanks for your best support.